Humidifier for hot-air furnaces



M. D. COHEN HUMIDIFIER FOR HOT AIR FURNACES Dec. 21 1926.

2 Sheets-Sheet 1 Filed July 16, 1926 l lNVENTOR wa k 7/046?! ATTORNEYS Dec. 21 1926. 1,611,633

M. D. COHEN HUMIDIFIER FOR HOT AIR FURNACES Filed July 16, 1926. 2 Sheets-Sheet 2 70 ATMOSPHERE P/PE'S lNVENTOR ATTORNEYS WITNESSES 7'77 W law Patented Dec. '21, 1926.

urrso STATES MORRIS D. COHEN, 0F NASHVILLE. TENNESSEE.

HUMIDH'IER FOR HOT-AIR FURNACES.

Application filed July 16,1226. Serial No. 122,957.

My present invention relates generally to hot air furnaces, and'more particularly to a humidifier for use in connection therewith having as its primary object the proper moistening of the air to offset the extreme dryness thereof under ordinary circumstances. It is well known that most hot air furnaces have what are commonly'known as water pans in connection therewith designed to moisten the air, but it is also well known that these water pans are commonly of'little, it any, effectiveness, since an entirely insufficient quantity of water is evaporated in the usual structure to thoroughly moisten the am i c It is the general purpose of my invention to, provide a humidifier'which will be effective and efficient and it is another and particular object of my invention to provide a humidifier which will be continuously effective and efl'icient without necessitating periodical replenishment and which will necessitate little, if any, attention.

A further object is the provision of a humidifier which may be easily and quickly controlled so as to supply to the warm air flowing from the jacket of the furnace just the required or desired amount of moisture distributed evenly among the several hot air flues commonly leading from the jackets of furnaces of this type.

With the above in mind my invention-resides in the apparatus to be now described with reference to the accompanyin draw ings which form a part of this app ication, and in which Figure 1 isa vertical sectional View through a hot air furnace and partly through my improvements with which the furnace is equipped;

Figure 2 is a horizontal sectional view taken through the upper portion of the furnace substantially on line 2-2 Fig. ,1 and, Figure 3 is a detail vertical section through the container and adjacent parts of my improved apparatus taken substantially on line 33 of Fig. 2.

Referring now to these figures and particularly t0 Figs. '1 and 2, 'I have shown a hot air furnace of substantially the usual type, including an inner fire pot comprising a fire bowl 10 and a dome 11 on the bowl, the furnace also including a jacket 12 surrounding andgspaced from the fire pot and from the upper portion of which a serie of hot air supply flues 13 radiate.

.wise shaped to conform to the contour of the fire pot so that it may be disposed closelv adjacent to the latter and provide for maximum efficiency in so far as the heating of the water within the casing 14 by the radiated heat of the fire pot. The inner wall of the casing 14 may be corrugated or otherwise formed to enhance heat absorption.

Generally speaking, the casing 14 is of rectangular shape, and as before stated, this casing is closed except for the vapor outlet tube 15 rising from its top and a water supply pipe 16 leading upwardly in its base, as well as an overflow pipe 17 communicating through the upper portion of one side. The casing may also have a drain pipe 14 provided with a cut off valve 14", as it may be necessary at times to drain and clean the casing. The casing may be supported by attaching the same to the fire pot, or upon legs, and the water supply and drain pipes may be utilized as supporting legs to avoid complication.

Within the casing 14 a feed control ball 18 coacts with the fittin 19 around the upper end of the water supp y pipe 20 so as to regulate the level of water Within the casing 14 under the automatic control of a float 21. i

This float is shown with its stem 22 fulcrumed within the casing 14 and pivotally connected at 23 to the stem 24 of the ball valve 18.

The vapor outlet pipe 15 rising from'the casing 14. is curved as shown at 25 in Fig. 1 over'the top of the fire pot to approximately the upper central portion of the hot air chamber 12 whereit is closed by a cap 26, and where it is provided with a series of small distributing tubes 27 radiating there from, with the outer ends thereof opening into the hot air flues 13 radiating from the upper end of the jacket 12.

Above the casing 14 the vapor supply pipe 15 has a Y-extension or branch 28 leading.

therefrom as best seen in Figs. 1, 2 and 3. The upper outer end 29 of this branch pipe 28 opens externally through the 'acket 12 of the furnace and adjacent to its lower inner end the vapor pipe 15 is provided with a ily controlled since the valve 30 has a stem- 31- projecting horizontally and outwardly;

through the furnace jacket 12 and provided with an outer handleby means of which it ma be readily and conveniently manipulate :and adjusted. This handle may, as

shown at 32, be a sprocket. wheel 'from' which a chain 32 is extended to the floor above, .in use, so as to avoid the necessity of approaching the furnace to regulate moisture of the heat.,

It is thus obvious that m invention provides a simple, compact an economical device which may be readily installed in practically all types of hot air furnaces, which will be continuously effective and efiicient with little, if any, attention, which 'is' ,capable of ready adjustment to control moisture of the heat supplied by the furnace, and which will be strong and durable in use, with no complicated parts to. get out of order.

;It is obvious of course that in the installation of the humidifier as proposed by my invention, the jacket 12 of the furnace may be provided with doors such for instance as indicated at 33 and 34','in Fig. 1, respectively, op osite to the casing 14, and to a cut off valile 35 in the water supply pipe 16 leading to the casing so that in case of necessary repair or adjustment ready access may be had to these parts.

I claim 2-- r 1. In a hot air furnace having a fire pot and a jacket around the fire pot having hot air supply flues leading therefrom, a humidifier including a closed water container mounted within the jacket adjacent to the fire pot 'and shaped to conform to the contour of the latter, water supply and overflow pipes leading to and from said container, means within the container for automatically controlling'the supply of water through said supply pipe to normally maintain tie desired evel of water in the container, a vapor supply pipe leading from the upper portion of the container into the upper portion of the jacket, a valve controlled branch pipe leading from said vapor supply pipe and opening exterior-1y through the jacket, and a'series of vapor supply tubes leading from the upper portion of the vapor supply ipe and opening into the hot air supply ues of the jacket.

2. In a hot air furnace havinga fire pot and a jacket around the tire pot having hot air supply flues leading therefrom, a humidifier including a closed water container mounted within the jacket adjacent to the fire pot, water supply and overflow pipes leading to and from said container, a vapor supply pipe leading upwardly from the container a series of moist air supply tubes leading from said vapor pipe one for each hot air supply flue, a pipe leading to the atmosphere at its one end andits other end connecting with the vapor pipe, a valve at the point of intersection of said vapor pi e and pipe leading to the atmosphere where y the degree of intermingling of vapor and atmosphere may be controlled, and means for operating the valve from a remote point.

' MORRIS D. COHEN. 

